Last night's 12-12-12 Sandy benefit saw Kanye West wearing a leather skirt, Coldplay's Chris Martin almost looking bashful as R.E.M.'s Michael Stipe joined him for a duet, and, yes, Paul McCartney fronting Nirvana to perform a new song written by the surviving members, "Cut Me Some Slack". Of course, Courtney Love was regally "not amused," as she told TMZ.

Check out footage of all three performances below, along with a video where Dave Grohl and Krist Novoselic talk about their new song and performing with the Beatles legend.